Шероховатость поверхностей при финишной алмазно-абразивной обработке

Показано, что шероховатость полированной поверхности зависит от отношения частот собственных колебаний молекулярных фрагментов на поверхностях инструмента и обрабатываемой детали. На шероховатость обработанной поверхности наибольшее влияние оказывают число молекулярных фрагментов, из которых состоят частицы шлама, их наиболее вероятный размер, частоты собственных колебаний фрагментов обрабатываемого материала и инструмента, теплопроводность обрабатываемого материала и режимы обработки

Combining local resources and mobile telephony to increase resort to care and reduce child mortality in Mali

In Mali, 1 child out of 6 does not reach the age of five. Most of these deaths could be avoided: children die mostly from untreated benign pathologies that could be easily cured locally. Though medical treatments are available in the local primary health centers, people resort too little and too late to healthcare, for cultural, financial and geographical reasons. Pesinet deploys an innovative health service that aims to drive prevention, detection and early-treatment of benign diseases. Agents make regular home visits to subscribed families in order to monitor the health of their children. They enter simple health data into a mobile phone and send it to the nearest medical center where the doctor reviews it and summons children at risk. This ongoing health monitoring system is combined with medical insurance at the local healthcare center. For a very affordable monthly fee, subscribing families benefit from the home visits, reductions on check-ups and medications, and education to prevention. This service is currently in operation in the city center of Bamako, and will be adapted for application in rural zones. Pesinet focuses on recourse to care by populations rather than on supply of new medical resources. By helping under-used primary health centers connect with populations, its objective is to generate a cultural change in the behaviors of populations and give health centers the capacity to improve the quality of the health services they offer. This paper intends to explain how this demand-driven approach could contribute to driving a sustainable change in the healthcare situation of Mali, and presents the promising results in terms of increase in resort to healthcare and local acceptability already encountered by the program

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